CN111864999B - Encoder assembly, motor and system with motor - Google Patents
Encoder assembly, motor and system with motor Download PDFInfo
- Publication number
- CN111864999B CN111864999B CN202010854257.9A CN202010854257A CN111864999B CN 111864999 B CN111864999 B CN 111864999B CN 202010854257 A CN202010854257 A CN 202010854257A CN 111864999 B CN111864999 B CN 111864999B
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- bearing
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2211/00—Specific aspects not provided for in the other groups of this subclass relating to measuring or protective devices or electric components
- H02K2211/03—Machines characterised by circuit boards, e.g. pcb
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
Abstract
The invention provides an encoder assembly, a motor and a system with the motor. The encoder cover and the encoder switching cover enclose an accommodating space, and the circuit board, the coded disc and the first bearing are all located in the accommodating space. The encoder cover is provided with a bearing positioning portion on which the first bearing is mounted. The circuit board is installed on the encoder switching cover, and the code wheel is fixed on the connecting shaft and is located between the circuit board and the encoder switching cover. The encoder switching cover comprises a heat insulation part and a heat conduction part which are fixedly connected, the heat insulation part is axially located between the coded disc and the second bearing, the heat conduction part is located on one side, away from the accommodating space, of the heat insulation part, and the second bearing is installed in the heat conduction part. The connecting shaft sequentially penetrates through the second bearing, the encoder switching cover, the coded disc, the circuit board and the first bearing along the axis. The encoder assembly can effectively reduce temperature rise and avoid encoder damage at high temperature.
Description
Technical Field
The invention relates to the technical field of motors, in particular to an encoder assembly, a motor and a system with the motor.
Background
The encoder is a sensor which is arranged on the servo motor and is used for measuring the position of a magnetic pole and the rotation angle and the rotation speed of the servo motor, and the encoder of the servo motor can be divided into a photoelectric encoder and a magnetoelectric encoder according to different physical media.
Referring to fig. 1, fig. 1 is a structural diagram of a conventional encoder assembly, a heat transfer path is shown by a dotted arrow in the diagram, the encoder assembly includes an encoder cover 11, an encoder adapter cover 12, a circuit board 13, a code disc 14, a small bearing 15, a large bearing 16 and a connecting shaft 17, the encoder adapter cover 12 is arranged at one end of the encoder cover 11, an accommodating space 10 is defined between the encoder adapter cover and the encoder adapter cover, the small bearing 15 and the large bearing 16 are adjacently arranged and are both installed on the encoder adapter cover 12, the connecting shaft 17 sequentially penetrates through the large bearing 16 and the small bearing 15, the circuit board 13 is installed on the encoder adapter cover 12 and is positioned in the accommodating space 10, and the code disc 14 is fixed on the connecting shaft 17 and is positioned between the circuit board.
The encoder is installed in servo motor, servo motor during operation, under extreme adverse circumstances, ambient temperature is abominable, the bearing generate heat and can't effectively disperse, cause and pile up, motor complete machine temperature rise leads to the encoder temperature rise to rise along with motor temperature rise, encoder circuit board 13 self also can generate heat, when the encoder temperature is too high, the chip can the stop work, leads to servo motor shutdown, influences the life-span of encoder itself simultaneously. Therefore, the temperature rise of the encoder is a design point which needs to be considered emphatically, and the temperature of the working environment for the operation of the motor can be raised to a certain degree by reducing the temperature rise of the encoder.
Disclosure of Invention
The first purpose of the invention is to provide an encoder assembly which can effectively reduce temperature rise, avoid encoder damage at high temperature, has a more compact structure and can reduce the axial dimension.
A second object of the present invention is to provide a motor having the above-described encoder assembly.
A third object of the invention is to provide a system having the above-mentioned electric machine.
In order to achieve the first object, the present invention provides an encoder assembly, which includes an encoder cover, an encoder adapter cover, a circuit board, a code wheel, a first bearing, a second bearing and a connecting shaft. An accommodating space is enclosed between the encoder cover and the encoder switching cover, and the circuit board, the coded disc and the first bearing are all positioned in the accommodating space. The encoder cover is provided with a bearing positioning portion on which the first bearing is mounted. The circuit board is installed on the encoder switching cover, and the code wheel is fixed on the connecting shaft and is located between the circuit board and the encoder switching cover. The encoder switching cover comprises a heat insulation part and a heat conduction part which are fixedly connected, the heat insulation part is axially located between the coded disc and the second bearing, the heat conduction part is located on one side, away from the accommodating space, of the heat insulation part, and the second bearing is installed in the heat conduction part. Two ends of the connecting shaft are respectively supported on the first bearing and the second bearing, and the connecting shaft sequentially penetrates through the second bearing, the encoder switching cover, the coded disc, the circuit board and the first bearing along the axis.
By above-mentioned scheme, when the motor is at the operation in-process, first bearing and the second bearing in the encoder subassembly can rotate and produce the loss and lead to generating heat, and the position of two bearings is adjacent in the current encoder subassembly, and the source that generates heat is concentrated, and holistic heat is covered by encoder switching by two bearing transmission, finally reaches the circuit board, can lead to the temperature rise of encoder circuit board. According to the encoder assembly, the first bearing is placed on the encoder cover, and after the heat generated by the first bearing is transmitted to the encoder cover, most of the heat can be emitted into the air from the rear side of the encoder cover, so that the heat source contacted by a circuit board is reduced, and the temperature rise is reduced. The rest temperature rises can be transmitted to the connecting axle and then in transmitting the air in the encoder lid or directly give off in the outside air of encoder subassembly, and the coefficient of thermal conductivity of air is low, is unfavorable for the heat conduction, and is less to the influence of encoder circuit board. Meanwhile, the encoder adapter cover adopts the combination of heat insulating materials and heat conducting materials, heat generated by rotation of the second bearing is blocked by the heat insulating part and cannot be transferred to the circuit board and the coded disc, the heat insulating part can effectively block heat transfer, and meanwhile, the heat generated by the second bearing can be transferred to the outside air through the heat conducting part.
The invention changes the existing centralized bearing layout into a distributed bearing layout, disperses the heating sources, reduces the heating sources contacted by the circuit board of the encoder component and reduces the temperature rise. In addition, through setting up first bearing in the accommodation space, can reduce the axial dimension of encoder subassembly for encoder subassembly structure is compacter, thereby realizes the miniaturization. Meanwhile, the size of the code disc is increased, a larger space is provided for scribing compared with the existing code disc, and a space for improving the physical precision of the encoder is provided in the machining process.
Preferably, the heat insulating part is made of a heat insulating material, and the heat insulating material is a ceramic fiber material or a nano-microporous heat insulating material.
Therefore, the heat insulation part can prevent heat generated by the second bearing from being transferred to the circuit board and the encoder.
Further, the heat conduction portion is made of a metal material.
It follows that the heat conducting portion made of a metal material can efficiently transfer heat generated by the second bearing to the air.
In a further aspect, the metal material is aluminum.
Therefore, the aluminum has good heat-conducting property, can realize good heat-radiating effect, is low in price and can reduce the cost.
Preferably, the heat conducting part and the heat insulating part are integrally injection-molded.
Preferably, the heat conducting part and the heat insulating part are fixedly connected through a fixing part.
The radial section of the heat conducting part is in a circular ring shape, the heat insulating part is provided with a first center hole in a penetrating mode along the axial direction, the inner diameter of the first center hole is smaller than that of the heat conducting part, the heat insulating part and the heat conducting part enclose a first bearing mounting groove, and the second bearing is located in the first bearing mounting groove.
Therefore, the inner diameter of the first central hole is smaller than that of the heat conducting part, so that the heat insulating part can effectively isolate heat, heat transferred to the circuit board is reduced, and temperature rise is reduced again.
Preferably, the code wheel is provided with a second central hole in an axially penetrating manner, the circuit board is provided with a third central hole in an axially penetrating manner, and the connecting shaft penetrates through the second central hole and the third central hole.
Therefore, the second center hole is formed in the middle of the coded disc and used for yielding the connecting shaft, the outer diameter of the coded disc is increased, a larger space is provided for scribing compared with the original coded disc, and a larger coded disc provides a space for improving the physical precision of the encoder.
One preferred scheme is that bearing location portion is provided with the second bearing mounting groove, and first bearing is located the second bearing mounting groove, and first bearing includes first inner circle and first outer lane, first outer lane and second bearing mounting groove fixed connection, first inner circle and connecting axle fixed connection.
Therefore, the first outer ring of the first bearing is fixedly connected with the bearing positioning part, and the first inner ring of the first bearing is fixedly connected with the connecting shaft, so that the stable support of the connecting shaft is realized.
Preferably, the bearing positioning portion protrudes axially from the inner surface of the encoder cover, and the first bearing is sleeved on the bearing positioning portion. A third bearing mounting groove is formed in the end portion of the connecting shaft, the first bearing comprises a first inner ring and a first outer ring, the first inner ring is fixedly connected with the bearing positioning portion, and the first outer ring is fixedly connected with the third bearing mounting groove.
It follows that the first bearing mounted inside the connecting shaft has a smaller size, which enables a further reduction in the heat generation of the bearing itself.
In order to achieve the second object, the present invention provides a motor including the above-mentioned encoder assembly.
To achieve the third objective, the present invention provides a system with an electric machine, which includes the electric machine.
Drawings
Fig. 1 is a cross-sectional view of a conventional encoder assembly.
FIG. 2 is a cross-sectional view of a first embodiment of an encoder assembly of the present invention.
FIG. 3 is a cross-sectional view of a second embodiment of an encoder assembly of the present invention.
The invention is further explained with reference to the drawings and the embodiments.
Detailed Description
First embodiment of encoder Assembly
The encoder assembly comprises an encoder cover 2, an encoder adapter cover 3, a circuit board 4, a code wheel 5, a first bearing 6, a second bearing 7 and a connecting shaft 8. The encoder cover 2 is made of a metal material or a plastic material. The outer diameter of the first bearing 6 is smaller than the outer diameter of the second bearing 7.
An accommodating space 21 is defined between the encoder cover 2 and the encoder adapter cover 3, and the circuit board 4, the code disc 5 and the first bearing 6 are all positioned in the accommodating space 21. The circuit board 4 is installed on the encoder switching cover 3, the code disc 5 is fixed on the connecting shaft 8 and is located between the circuit board 4 and the encoder switching cover 3, a shaft shoulder 83 used for limiting the code disc 5 is arranged on the connecting shaft 8, and the code disc 5 and the connecting shaft 8 can be in interference fit or clearance fit and are fixedly connected in a gluing mode.
The encoder cover 2 is provided with a bearing positioning portion 22, the bearing positioning portion 22 protrudes from the inner side wall 23 of the encoder cover 2 along the axial direction, the bearing positioning portion 22 is provided with a second bearing installation groove 221, the first bearing 6 is located in the second bearing installation groove 221, the first bearing 6 comprises a first inner ring and a first outer ring, the first outer ring is fixedly connected with the second bearing installation groove 221, the first outer ring is in clearance fit with the second bearing installation groove 221 and is fixedly connected with the second bearing installation groove in a gluing mode, and the first inner ring is fixedly connected with the connecting shaft 8.
The heat conducting portion 33 is located on a side of the heat insulating portion 32 away from the accommodating space 21 and protrudes outward from the heat insulating portion 32 in the axial direction. The heat insulating portion 32 and the heat conducting portion 33 are fixedly connected by a fixing member such as a screw 34. The screws 34 axially penetrate the heat insulating portion 32 and extend into the fixing grooves 332 of the axial end wall of the heat conducting portion 33, the number of the screws 34 is plural, and the plural screws 34 are arranged along the circumferential direction of the heat conducting portion 33.
The main body part 31 and the heat insulating part 32 are both made of a heat insulating material, which is a ceramic fiber material or a nano-porous heat insulating material of tianjin gute energy saving and environmental protection technologies ltd, and the heat conducting part 33 is made of a metal material, preferably, aluminum.
The heat conducting portion 33 has a circular radial cross section, the heat insulating portion 32 is provided with a first center hole 321 penetrating in the axial direction, the inner diameter of the first center hole 321 is smaller than the inner diameter of the heat conducting portion 33, the heat insulating portion 32 and the heat conducting portion 33 enclose a first bearing mounting groove 331, and the second bearing 7 is located in the first bearing mounting groove 331.
The code wheel 5 is provided with a second center hole 51 penetrating in the axial direction, and the circuit board 4 is provided with a third center hole 41 penetrating in the axial direction. Both ends of the connecting shaft 8 are respectively supported on the first bearing 6 and the second bearing 7, and the connecting shaft 8 sequentially passes through the second inner ring of the second bearing 7, the first center hole 321 of the encoder adapter cover 3, the second center hole 51 of the code wheel 5, the third center hole 41 of the circuit board 4 and the first inner ring of the first bearing 6 along the axis.
During assembly, the snap spring 82 is sleeved in the snap spring groove 81 of the connecting shaft 8, then, the second bearing 7 is pressed into the connecting shaft 8 to be in contact with the snap spring 82, then, the second bearing 7 is installed in the first bearing installation groove 331, the second bearing 7 is in clearance fit with the first bearing installation groove 331, and the second outer ring of the second bearing 7 is fixedly connected with the first bearing installation groove 331 in a mode of gluing in the clearance. Then, the code wheel 5 is fitted to the coupling shaft 8 from the left side and mounted in a position adjacent to the shoulder 83. Next, the circuit board 4 is fitted to the connecting shaft 8 from the left side and the circuit board 4 is fixed to the encoder adapter cover 3 with screws 42. Next, the first bearing 6 is fixed in the second bearing mounting groove 221 of the encoder cover 2. And finally, inserting the left end of the connecting shaft 8 into the first bearing 6 to finish assembly.
The dashed arrows in FIG. 2 represent the heat transfer path of the encoder assembly. In the operation process of the motor, the rotating shaft of the motor drives the connecting shaft 8 to rotate, and the first bearing 6 and the second bearing 7 can rotate to generate loss to generate heat.
As shown in fig. 1, in the conventional encoder assembly, the bearings 15 and 16 are located adjacent to each other, the heat source is concentrated, and the entire heat is transferred from the bearings 15 and 16 to the encoder adapter cover 12 and finally reaches the circuit board 13, which may cause the temperature of the encoder circuit board 13 to rise.
As shown in fig. 2, in the encoder assembly of the present invention, the first bearing 6 is placed on the encoder cover 2, most of the heat generated by the first bearing 6 is dissipated into the air from the left side of the encoder cover 2 after being transferred to the encoder cover 2, so that the heat source contacted by the circuit board 4 is reduced, the temperature rise is reduced, the rest of the temperature rise is transferred to the connecting shaft 8 and then transferred to the air in the encoder cover 2 or directly dissipated to the air outside the encoder assembly, the heat conductivity of the air is low, the heat conduction is not facilitated, and the influence on the encoder circuit board 4 is small. In addition, when heat generated from the second bearing 7 is transferred to the first bearing installation groove 331 made of aluminum on the encoder adapter cover 3, the heat insulating portion 32 can effectively insulate the heat, thereby reducing the heat transferred to the circuit board 4 and reducing the temperature rise again.
The invention changes the existing centralized bearing layout into a distributed bearing layout, disperses the heating sources, reduces the heating sources contacted by the circuit board of the encoder component and reduces the temperature rise. Meanwhile, the combination of heat insulating materials and heat conducting materials is adopted through the encoder adapter cover, heat transfer is effectively blocked, and heat is effectively dissipated through a new heat transfer path, so that the temperature rise of the encoder assembly is reduced, and the operation reliability is improved. In addition, through setting up first bearing in the accommodation space, can reduce the axial dimension of encoder subassembly for encoder subassembly structure is compacter, thereby realizes the miniaturization. Meanwhile, the size of the code disc is increased, a larger space is provided for scribing compared with the existing code disc, and a space for improving the physical precision of the encoder is provided in the machining process.
Second embodiment of encoder Assembly
As a description of the second embodiment of the encoder assembly of the present invention, only the differences from the first embodiment of the encoder assembly described above will be described below.
Referring to fig. 3, in the present embodiment, a bearing positioning portion 222 protrudes from an inner surface of the encoder cover 220 in an axial direction, and the first bearing 26 is sleeved on the bearing positioning portion 222. The end of the connecting shaft 28 is provided with a third bearing mounting groove 281, the first bearing 26 comprises a first inner ring and a first outer ring, the first outer ring and the third bearing mounting groove 281 are fixedly connected in an interference fit manner, the first inner ring and the bearing positioning portion 222 are in clearance fit and fixedly connected in a gluing manner, the first bearing 26 installed in the connecting shaft 28 has a smaller size, and the smaller-size bearing can further reduce self heat productivity.
Motor embodiment
The motor of this embodiment includes the encoder subassembly in each above-mentioned encoder subassembly embodiment, and the pivot and the connecting axle fixed connection of motor. The motor is a servo motor.
System with the motor
The system with the motor of the embodiment comprises the motor in the motor embodiment. The system may be a robot or the like having a servo motor.
In addition, the heat conducting part can also be integrally injection-molded with the main body part and the heat insulating part, namely, an aluminum ring is formed by turning an aluminum block and then is placed into an injection mold for injection molding, so that the aluminum ring and the heat insulating material are integrally injection-molded, and the aluminum ring is the heat conducting part. The coded disc can also be positioned by arranging a clamp spring on the connecting shaft. The heat conducting part of the encoder adapter cover can also be made of other metal materials with good heat conductivity. The heat insulation part and the heat conduction part can also be fixedly connected in a bonding mode. The above-described modifications also achieve the object of the present invention.
Finally, it should be emphasized that the above-described preferred embodiments of the present invention are merely examples of implementations, not limitations, and various changes and modifications may be made by those skilled in the art, without departing from the spirit and scope of the invention, and any changes, equivalents, improvements, etc. made within the spirit and scope of the present invention are intended to be embraced therein.
Claims (12)
1. The encoder assembly comprises an encoder cover, an encoder adapter cover, a circuit board, a coded disc, a first bearing, a second bearing and a connecting shaft;
the method is characterized in that:
an accommodating space is enclosed between the encoder cover and the encoder adapter cover, and the circuit board, the coded disc and the first bearing are all positioned in the accommodating space;
the encoder cover is provided with a bearing positioning portion on which the first bearing is mounted;
the circuit board is mounted on the encoder adapter cover, the coded disc is fixed on the connecting shaft, and the coded disc is positioned between the circuit board and the encoder adapter cover;
the encoder adapter cover comprises a heat insulation part and a heat conduction part which are fixedly connected, the heat insulation part is axially positioned between the coded disc and the second bearing, the heat conduction part is positioned on one side of the heat insulation part, which is far away from the accommodating space, and the second bearing is installed in the heat conduction part;
two ends of the connecting shaft are respectively supported on the first bearing and the second bearing, and the connecting shaft sequentially penetrates through the second bearing, the encoder switching cover, the coded disc, the circuit board and the first bearing along an axis.
2. The encoder assembly of claim 1, wherein:
the heat insulation part is made of heat insulation materials, and the heat insulation materials are ceramic fiber materials or nanometer micropore heat insulation materials.
3. The encoder assembly of claim 2, wherein:
the heat conducting portion is made of a metal material.
4. The encoder assembly of claim 3, wherein:
the metal material is aluminum.
5. The encoder assembly of any of claims 1 to 4, wherein:
the heat conducting part and the heat insulation part are integrally formed in an injection molding mode.
6. The encoder assembly of any of claims 1 to 4, wherein:
the heat conducting part is fixedly connected with the heat insulating part through a fixing part.
7. The encoder assembly of any of claims 1 to 4, wherein:
the radial cross-section of heat conduction portion is the ring form, thermal-insulated portion is provided with first centre bore along the axial ground of running through, the internal diameter of first centre bore is less than the internal diameter of heat conduction portion, thermal-insulated portion with the heat conduction portion encloses into first bearing mounting groove, the second bearing is located in the first bearing mounting groove.
8. The encoder assembly of any of claims 1 to 4, wherein:
the code disc is provided with a second center hole in an axial penetrating mode, the circuit board is provided with a third center hole in an axial penetrating mode, and the connecting shaft penetrates through the second center hole and the third center hole.
9. The encoder assembly of any of claims 1 to 3, wherein:
the bearing positioning portion is provided with a second bearing mounting groove, the first bearing is located in the second bearing mounting groove, the first bearing comprises a first inner ring and a first outer ring, the first outer ring is fixedly connected with the second bearing mounting groove, and the first inner ring is fixedly connected with the connecting shaft.
10. The encoder assembly of any of claims 1 to 3, wherein:
the bearing positioning part protrudes from the inner surface of the encoder cover along the axial direction, and the first bearing is sleeved on the bearing positioning part;
the connecting shaft is characterized in that a third bearing mounting groove is formed in the end portion of the connecting shaft, the first bearing comprises a first inner ring and a first outer ring, the first inner ring is fixedly connected with the bearing positioning portion, and the first outer ring is fixedly connected with the third bearing mounting groove.
11. An electrical machine comprising an encoder assembly according to any of claims 1 to 10.
12. System with an electric machine, characterized in that it comprises an electric machine according to claim 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010854257.9A CN111864999B (en) | 2020-08-24 | 2020-08-24 | Encoder assembly, motor and system with motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010854257.9A CN111864999B (en) | 2020-08-24 | 2020-08-24 | Encoder assembly, motor and system with motor |
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| Publication Number | Publication Date |
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| CN111864999A CN111864999A (en) | 2020-10-30 |
| CN111864999B true CN111864999B (en) | 2021-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010854257.9A Active CN111864999B (en) | 2020-08-24 | 2020-08-24 | Encoder assembly, motor and system with motor |
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| CN (1) | CN111864999B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112271875A (en) * | 2020-11-03 | 2021-01-26 | 珠海格力电器股份有限公司 | Heat insulation assembly, encoder assembly and motor |
| CN113890278B (en) * | 2021-09-26 | 2023-05-12 | 珠海格力电器股份有限公司 | Magneto-electric encoder and motor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004135474A (en) * | 2002-10-15 | 2004-04-30 | Yaskawa Electric Corp | Motor equipped with revolution detector |
| JP2013258880A (en) * | 2012-06-14 | 2013-12-26 | Nikon Corp | Detector and motor device |
| CN108134485A (en) * | 2016-12-01 | 2018-06-08 | Ifp新能源公司 | Electric rotating machine with integral type magnetic position sensor |
| CN210444094U (en) * | 2019-08-19 | 2020-05-01 | 广东美的智能科技有限公司 | Motor with encoder |
| CN211127473U (en) * | 2019-12-18 | 2020-07-28 | 配天机器人技术有限公司 | Encoder heat insulation mechanism of servo motor, servo motor and automation equipment |
-
2020
- 2020-08-24 CN CN202010854257.9A patent/CN111864999B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004135474A (en) * | 2002-10-15 | 2004-04-30 | Yaskawa Electric Corp | Motor equipped with revolution detector |
| JP2013258880A (en) * | 2012-06-14 | 2013-12-26 | Nikon Corp | Detector and motor device |
| CN108134485A (en) * | 2016-12-01 | 2018-06-08 | Ifp新能源公司 | Electric rotating machine with integral type magnetic position sensor |
| CN210444094U (en) * | 2019-08-19 | 2020-05-01 | 广东美的智能科技有限公司 | Motor with encoder |
| CN211127473U (en) * | 2019-12-18 | 2020-07-28 | 配天机器人技术有限公司 | Encoder heat insulation mechanism of servo motor, servo motor and automation equipment |
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| CN111864999A (en) | 2020-10-30 |
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